| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687 | /* * * Copyright 2016, Google Inc. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are * met: * *     * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. *     * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following disclaimer * in the documentation and/or other materials provided with the * distribution. *     * Neither the name of Google Inc. nor the names of its * contributors may be used to endorse or promote products derived from * this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */#include "test/cpp/qps/limit_cores.h"#include <grpc/support/cpu.h>#include <grpc/support/log.h>#include <grpc/support/port_platform.h>#ifdef GPR_CPU_LINUX#ifndef _GNU_SOURCE#define _GNU_SOURCE#endif#include <sched.h>namespace grpc {namespace testing {int LimitCores(const int* cores, int cores_size) {  const int num_cores = gpr_cpu_num_cores();  int cores_set = 0;  cpu_set_t* cpup = CPU_ALLOC(num_cores);  GPR_ASSERT(cpup);  const size_t size = CPU_ALLOC_SIZE(num_cores);  CPU_ZERO_S(size, cpup);  if (cores_size > 0) {    for (int i = 0; i < cores_size; i++) {      if (cores[i] < num_cores) {        CPU_SET_S(cores[i], size, cpup);        cores_set++;      }    }  } else {    for (int i = 0; i < num_cores; i++) {      CPU_SET_S(i, size, cpup);      cores_set++;    }  }  GPR_ASSERT(sched_setaffinity(0, size, cpup) == 0);  CPU_FREE(cpup);  return cores_set;}}  // namespace testing}  // namespace grpc#elsenamespace grpc {namespace testing {// LimitCores is not currently supported for non-Linux platformsint LimitCores(const int*, int) { return gpr_cpu_num_cores(); }}  // namespace testing}  // namespace grpc#endif
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